There was once a time when only the most talented musicians — people like Frank Sinatra, Diana Ross and Elvis — would dare to make the jump to movies. But with music videos giving birth to a generation of camera-friendly musicians, however, it isn't just Madonna, Eminem and Justin Timberlake playing the actor/singer game, but also everybody from Ashlee Simpson to Diddy to Macy Gray.

The tide has shifted so much, in fact, that it's sometimes more conspicuous these days when a musician chooses not to make movies. With that in mind, we've compiled this list of the top musical acts that have avoided the silver screen so far — and, based on what we know about them, whether their acting debuts would yield a "Godfather" or a "Glitter."